Industry recommended SPF 30. Can stay in sun 30 times longer without burning. Designed for all day protection from the harmful rays of the sun. Waterproof, resists sweating, and moisture. Greaseless formula dries rapidly and will not affect one's hand grip nor, come off on tools and equipment. Specially formulated for the Telecom and Utility industries. One application lasts all day. Tested safe on Rubber Gloves.